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Note 8 - Goodwill (Detail) - The following table details changes in recorded goodwill (in thousands): (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011
Balance |  | $ 54,050 | $ 114,745
Additional goodwill related to acquisitions |  | 360 | 6,305
Goodwill adjustments | 67,000 | 410 | 67,000
Goodwill impairment in 2011 |  |  | (67,000)
Balance | $ 54,050 | $ 54,820 | $ 54,050

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition No authoritative reference available. + References No definition available. + Details
Name: | us-gaap_GoodwillAcquiredDuringPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | us-gaap_GoodwillImpairedAdjustmentToInitialEstimateAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | us-gaap_GoodwillImpairmentLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration